Haven't used a tarp. You'd have to set it up to size one. I've been in mine through a few rainstorms and no leaks.@magtech @Time2fish @jblam wondering if any of you have thrown a tarp over this as a rain fly? I just got this tent and will be using it for hunting season. I’d like to get a tarp to help protect it from sap, sun, and help snow slide off better but not sure what size to get. TIA